This class represents OEIsMemberPtr template functor that
performs set membership tests. This functor differs
from the OEIsMember functor in that the internal
storage type differs from the test type.
While instances of abstract classes cannot be easily
stored, however, pointers to abstract class instances do not pose
the same storage problems.
OEIsMemberPtr stores pointers to
data types, while the template type of the class is a single
dereferenced version of the storage type.

Constructs the functor using an iterator (OEIter)
over values of the same type as the functor template argument.
Addresses instead of instances or references to the data are
stored internally.

OEIsMemberPtr(OESystem::OEIterBase<C>*i)

Constructs the functor using an iterator (OEIterBase)
over values of the same type as the functor template argument.
Addresses instead of instances or references to the data are
stored internally.

template<classT>OEIsMemberPtr(Tbgn,Tend)

Constructs the functor using a sequence of values. The values
from ‘bgn’ up to, but not including ‘end’ are used to construct the
functor. Using this constructor, the functor may be constructed
from arrays and STL containers.